Step 1: Combine boiling water, instant expresso coffee powder and Marsala in a heatproof bowl.
Step 2: Using an electric mixer, bear eggs and icing sugar together for 5 minutes or until thick and creamy. Add mascarpone cheese. Beat on low speed until just combined (do not over mix).
Step 3: Dip half the Savoiardi biscuits, 1 at a time, in the instant expresso coffee mixture. Arrange over the base of a 5 cm deep, 28 cm x 20 cm base, 12 cup capacity dish, trimming to fit, if necessary. Spread half the mascarpone cheese mixture over Savoiardi biscuits layer. Repeat with remaining Savoiardi biscuits, instant coffee expresso mixture and mascarpone mixture. Cover. Refrigerate overnight. Serve topped with chopped Flake/s.